Developed for daytime cleaning, the 3.5Q Sealed HEPA Upright is engineered to be the ultimate in bagless filtration with True Balance brushroll and an innovative sound-dampening system. Synthetic media filters 96.75 percent of allergens down to 0.3 microns for cleaner air. This LEED Compliant and CRI Green Label certified, bagless cleaner combines a clean-air system with the ultimate in bagless filtration, sealed HEPA and an extra-large dust cup.